Adjustable propeller



1. H. BELD|N.'

ADJUSTABLE PROPELLER.

' APPUCATION FILED DEC. I. 1917.

I Patented Feb. 17,1920.

2.SHEETSSHEET 1.

I II iii" J. H. BELDIN.

ADJUSTABLE PROPELLER.

APPLICATION FILED 050.1.1917.

1,331,045. Patented Feb. 17,1920.

2 SHEETSSHEET 2.

UNITED STATES PATENT onmon.

JAMES H. BELDIN, OF MALIN, OREGON.

ADJUSTABLE PROPELLER.

To all whom it may concern: 7

Be it known that 1, JAMES H. BELDIN, a citizen of the United States, residing at Marlin, in the county of Klamath and State of Oregon, have invented new and ,nseful Improvements in Adjustable Propellers, of which the following is a specification.

This invention relates to screw propellers, and more especially to those having adjustable blades; and the object of the same" is to produce an improved form of adjustment whereby the pitch of the blades can be simultaneousiy altered to such an extent, as to cause the propeller to reverse its action while still'rotating in the same direction.

The invention consists in novel means for efiecting the adjustment of the blades while yet permitting their removal for repair or substitution, all as hereinafter more fully described and claimed and as shown in the drawings wherein Figure 1 is a side elevation, Fig. 2 a plan view, and Fig. 3 an end elevation of one type of my invention, while Fig. 4 shows various details thereof in perspective.

Fig. 5 is a side elevation and Fig. 6 a plan view of another type of my invention, while Fig. 7 shows various details in perspective. 4

Figs. 8 and 9 are slightly modified forms of (phe forks, showing their arms as piv ote The main shaft 1 has a T-head 2 at its front end, and each blade 3 has a tubular stem 4. at its inner end revolubly and removably fitting over one branch of the T-head. In the type shown on Sheet 1 the stem 4 is tubular and the branch is solid, whereas in the type of my invention shown on Sheet- 2 the stem is solid and the branches of the T'-head are tubular'as will be explained-below. At the inner end ofeach stem an arm 5 projects rigidly in one direction and is pierced with a hole 6, while a' segment- 7 projects rigidly in the opposite direction and carries-a guide 8. The arm and segment may be of onepiece, and they stand in a v plane at right angles to the axis of the steni.

' one stem These elements are 1n reverse, position with respect to the same elements on the other. stem so that when the parts are assembled as best seen in Fi' 2 and 3, the arm of projects .t rough the guide of the other.

The setting mechanism comprises a lever "slot 36 in the other arm.

in slots 47 in the sides of propeller for 'a Specification of Letters Patent. Patented F b 17, 192() Application filed December 1,

1917. Serial No. 204,941.

10 having a loop 11 in its body and its upof the fork and the hub itself being slidably mounted on the main shaft. The-fork arms are provided with outstanding pins 2i which slidably engage eyes 25 swivelly mounted in holes 6 in the arms 5. Therefore when the lever is moved the rods 19 and ring are moved forward and backward. he rin'g causes themovement of the hub and fork, and the pins on the fork are slidably mounted in the eyes 25 which latter are swiveled in the outer ends of-the arms 5. These arms and therefore the stems 4 carried. by them arethus turned on the branches of the T-head 2 to set the blades- 3 at the proper or desired angle. Meanwhile the main shaft 1 and the hub and fork continue their rotation, and the blades are revolved in the manner well understood.

The type of the invention shown on Sheet 2 is much the same with theexceptions above mentioned and others which follow from this exception. Each blade 33 has a solid stem 34: with a laterally projecting arm 35 at its inner end providedwith a longitudinal slot 36. The main shaft has a tubular T-head 32 slotted along one side and closed by a filler 31 adapted to be held in the slots by clips 30. The lever mechanism, rods, grooves and hub are the same, but the forkarms 43 carry pins 44 and 45 one of which rises through the slot 36 in one arm 35 and the other of which depends through the Said arms work the T-head and are arranged a little, out of alinement with each other, and the'filler may be notched'as at 48 so that these slots extend into the filler when the latter is in place.

Igjhave described my invention asapplied toa' propeller. While this is an article generally understood as working under the surface of the' water, it may obviously be an air flying machine. Also the device might be, an ordinary fan if it were desired to set its blades at a difi'erent angle,

two blades oppositel I would not, therefore, be limited to the uses of this device, by whatever name it is called. The obvious purpose of the invention is to permit the operator by means of the lever 10 to adjust the pitch of the and simultaneously. \Vhen these stand ob ique in one direction. with the shaft revolving constantly, a current will be set up in the liquid or air in one direction, when the blades are adjusted edge on no effect will be produced, and when they are adjusted to such an extent that they stand oblique in the opposite direction, said current would be reversed-a1] as well understood and needing no further detailed explanation.

Instead of making the fork-arms 23 rigid and providing them with pins 24: to en age holes 6 as in Fig. 4, or instead of ma ing the fork-arms 48 rigid and providing them with pins l4: and to engage slots 36 as in Fig. 7, I may make the fork-arms 50 separate from the shank of the fork as seen in Fig. 8 and pivot them thereto as at 51, providing their outer ends with eyes 52 which are in turn pivoted to the arms 5 or 35 in a manner which will be clear, or, as seen in Fig. 9, I may make the fork-arms 53 slightly curved in their length, and of course they may be longer or shorter as required by the proportion of parts. This modification does away with the sliding of the pin 2% in the eye 25 or the sliding of the pins H and 45 in the slot 36, but the principle of my invention is unchanged.

What is claimed as new is 1. The combination with a main shaft carrying a T-head at its front end, a pair of blades having tubular stems rotatably mounted on the branches of said T-head,

and on each stem an arm projecting in one mounted on the branches of said T-head,

an arm at the inner end of each stem projecting in one direction and a segment projecting in the other, both standing in a plane at right angles to the axis of the stem, and a guide carried by each segment and adapted to loosely embrace the arm on the other stem; of a fork having a tubular shank slidably mounted on said main shaft, means for adjusting it; longitudinally, and connections betweeneach fork arm and one of the stem-arms, for the purpose setforth.

3.-The combination with a main shaft carrying a T-head at its front end, a pair of blades having tubular stems rotatably mounted on the branches of said T-head, an arm at the inner end of each stem projecting in one direction and a segment projecting in the other, both standing in a plane at right angles to the axis of the stem,

and a guide carried by each segment and adapted to loosely embrace the arm on the other stem; of a. fork having a tubular shank slidably mounted on said main shaft, means for adjusting it longitudinally, pins projecting outward from the fork-arms, and eyes swiveled in the outer end of the stemarms and loosely receiving said pins.

In testimony whereof I aflix my signature.

JAMES H. BELDIN. 

